Portable chain saw filing device



Ap 7, 1953 M. J. BUTTS PORTABLE CHAIN SAW FILING DEVICE 5 SheetsSheet 1 Filed May 15, 1951 INVENTOR. [Wqum'ce J Bu HS April 7, 1953 M. J. BUTTS PORTABLE CHAIN SAW FILING DEVICE 3 Sheets-Sheet 2 Filed May 15, 1951 QQQ Q @EQQG .ll v* Q INVENTOR. I Maurice dTBuHs BY v Mmn/fm April 7, 1953 M. J. BUTTS PORTABLE CHAIN SAW FILING DEVICE 3 Sheets-Sheet Filed May 15, 1951 J m 3 .YN

INVENTOR; Maurice J. Buffs BY Patented Apr. 7, 1953 UNITED STATES}.

PATENT OFFICE 2,6Z:v3,'7612.v

PORTABLE".'CHAINi-SAW FILING DEVICE 'Maurice. J.-Butts; Eugene;:.0reg: Application May v 15, 1951, Serial N6. 2261391 v TCIims-r 11" p p This invention. broadly; relates to'apparatus for sharpeningegsawseandspecifically; to devices for filin'g theiteth of .chain saws,

Semi-iportabland portablich'ain. sawslare'novv iniuniversalluseland "are particularlyliniuse on r farms "and'in the forests of America 'as'well as elsewhere The great demand'fo'r chain" saws has resulted in the ,producti'onofiidifirent types of "suchsaws toperform specific types of work. As a result'therehas been developed. a great vari ety; of lichain saws each "with slightly diiferent types of sawteeth' difi'erent in contour,:- setting, angle and spacing, but all'ifaimed at performing. with armaximum' of ffiiency.. a

Ins axiomatic that the efiectiveness (of. a,.tool 15 forthevwork for which it is'intendd "is directly effectiveness. ofiwhich, is controlled.;iby.- their sharpness; When chain saws become dull they, not lionlyjlose their efiicien.cy,..b'ut becomes difficult to"handl.; It'is thus imperative that they, be. maintained sharpened at all'itimes. Since-then greatest'number of "chain saws \are used.in.ithe. Woods and. farms usually. distanct' fromiarea'sw. where .sh'arpening machines are available, much time-is lost .whenitherchain-saws are takenntomachine. shops ifor. precision sharpening. This, of course, increases the operating icostsandgasua result; chainesavv users are reluctant to takethe saws to "maintenance. shops ;for sharpening. Ifil has, therefore, become the; general practice to sharpen these saws by; hand-Iii); the :fildl' How ever, not only is. this considered "an; undesirable and slow chore; but 'suchihaphazard sharpening, oftentimes 4 decreases the efficiency; ofrth'e chain; sawandlm'ay; even reducexit's usefulli'fe; since it; is practicallyjmppssibl .to file allof 'the teeth at; the .same angle, the same depth" and to the same 40 degree" of z'sh'arpnesst'.

It'is th'e LprimarytJObject; therefore, of "my in: vention" to provide a highly" portable device for filing chain-saws in the"field"or'fon=th'e .farm which can be operatedwy 0116' Without special skill' in" handling fils:

Still another object 'of*theinvention= is 1 to provid -a' device for sharpeningch'ain' saws hav ing teeth of diverse contours withiiillassurancethat the filing will be done at the proper angle 59 and de'ptl ii Another-object of the" invention" is 1 to provid a fili'ng fde'vice which: may beuad-justed 1:0 accuz'ately and i'speedily" sharpen? saw -te'eth" h'aving' different cutting-iedge -contours and-Kset atrvari ousifanglesta i:

(Cl. m -31 2 a Still another'object of thisinventidn is to provide' a filing device 'so constructed that' it' may-"be used in the field'tosharpenthe teeth of most types of *chain saws including round; chisel, hooded chisel, rivet .pitch and others.

Afurther object ofmy, invention is to provide a chain-saw filing device particularly adaptable for use in the'woods oron the'fa-rm but which-1 can easily be adapted for use in'a shop;

Another objectoftherinvention' is to provide a filing, device adapted. to hold different types of files in proper trelation to the teeth" of thesawj" provide means for permitting the file to contact" each tooth during its" reciprocation and. there'- after allow it to .be raised above the apex of the-'- chain saw, and to provide "means for positioning the file in relation to the'saw teeth' at a pre determined angle.

Astillfurther object ormyinvention is to provide. in afilin device, simple yet effective means for makingthe. necessary adjustments to set the device=in position for precision filing;

A still further object of the invention is to provide ashighly portable; inexpensive, fast, accurate, durable "and simple devicefor sharpening 1. teeth lofchain-saws in the Woods, on the farm or in .the;shop.

Other objectsandadvantages will undoubtedly come to mind .asthe detailed description. which L follows unfolds .itselff The description must be read in conjunction. with. the accompanying) drawings .which illustrate but oneiembodi'ment by? which the invention may. beerealized; although I it is. possible :to employthe: same underlying: principles: in other embodiments incorporatingslightly different --contours and structural lcharacteristics :to= easily adapt theinventiomiwithout 7 material changesltherein to other typesof .chainsavvs not illustrated and-described.hereini Figure 1.-iss a: sidenelevation embodying: the. principles-0f nay-- invention showing it attached to the bar of a chain-saw and inmposition to file and illustrating, in dotted. lines, the-tilting. movement of the device to-remove it-outof-filin g .-position;

Figure 21s a side elevation of a difierent angledsupporting bracket adaptedfor attachment to the; saw -=bar showing a fragment of thehinge joint;

Figure 3 is a-side elevation ofanother'isuplw" portingJIbra-cket *having-fthe same characteristicsas the tbracket'shown inTFigure'Z, except that the platformiportion" thereof has a different angular position;

Figure- 4 is a side elevation: of 'still another'sulo porting bracket having the same P characteristics as brackets shown in Figures 2 and 3 but with the platform portion having still a different angular position;

Figure 5 is an end view of the hinge joint formed between the platform portion of the supporting bracket and the base of the filing device. showing the hinge pin as being removable;

Figure 6 is an elevational view of the device embodying the principles of my invention with the saw bar and saw chain in fragments and showing the filing device embodying my invention in operative relationship to the chain-saw and its attachment to the saw bar; V

Figure 7 is a perspective rear view, partially in section, of the file carrier and file carrier supporting frame embodying the principles of my invention;

Figure 8 is a fragmentary perspective of a round type of file used in connection with the-file carrier embodying the principles of my invention;

Figure 9 is a fragmentary perspective of a diamond shaped file used in connection with the file carrier embodying the principle of my invention;

Figure 10 is a fragmentary top plan view, embodying the principles of my invention, showing some of its structural characteristics and its relation to a chain saw;

Figure 11 is also a fragmentary top plan view of thedevice embodying the principles of my invention revealing some of its structural characteristics and shown connected on the side of the saw bar, opposite from that shown in Figure 10;

and

Figure 12 is an end elevation of one of the rod and file securing wall showing its structural characteristics.

Shown in the drawings by way of illustration only, and to facilitate the description of the invention, is a fragmentary portion of a saw bar, designated generally by reference character A. The saw bar has the usual structural characteristics, such as a slight arcuation of its periphery at its widest part, approximately midway thereof. A circumferential groove i, usually U-shaped in cross section, is formed within the'saw bar at its periphery and forms a case hardened tract around which the chain saw travels. Also shown for illustrative purposes is a fragmentary portion of a chain saw of any well known construction, designated generally by reference character B. The saw chain is made up of the usual linkage forming an endless chain and permitting it to travel about the saw bar A withits guides 2 being confined in groove 1. Saw chain B may have the round type of teeth 3, or any other type of teeth of well known construction. It should, therefore, be understood that the showing of the round type saw teeth 3 in the drawings does not limit the use of the device embodying the invention to the filing of this type teeth only, but it may be used for filing teeth of most types of chain saws.

While, as stated, the device embodying the principles of my invention may be used with almost any type of chain saw, it is necessary, however, to slightly alter the saw bar A before it can be used at all. The alteration does not affect the operation of the chain saw to any degree and consists merely of the precision drilling of two laterally spaced small openings 4 and 5 therein equi-distant from the flattest portion of the saw bars periphery. Since these openings are small, the rigidity of the saw bar is not-materially affected, nor can sawdust pack therein and thus affect the operating efficiency of the chain saw during its operation. After thesawbar has been 4. thus modified, it is ready to have attached to it the device embodying my invention.

The invention itself, in its present embodiment, has a supporting bracket body, consisting of a face plate 6 and a platform 1, and'is removably secured to the saw bar A. This is accomplished by having a pair of spaced threaded studs 8 and 9, aligned to fit snugly into openings l and 5, extending from face plate 6. No threads are provided on the studs 8 and 9 at their juncture with the face plate 6 for a distance equal to approximately thewidth of the saw bar A. Thus there can be no fre play between the faceplate any one of the angles shown in Figures 2, 3 and 4. The angle of. platform in relation to the face plate is determined by the type of configuration and pitch possessed by the teeth of the chain saw to be sharpened.

There is provided, as an integral part of each platform regardless ofits angle, a plurality of hinge eyes I2 that are formed on the back face thereof, thereby. making the platform one leaf of a hinge joint for the purposes hereinafter to I be described. A pair of spaced openings [3, but one of which is shown in the drawings is also provided in the platform 1 for the purpose hereinafter to be explained.

A frame supporting base of hinge ears l5, forms the other leaf of the hinge joint, when the removable hinge pin l6 interlocks the, ears 12 and E5 of the platform land base [4. By providing a reparable hinge joint between the platform 6 and base 13, most chain saws now on the market can b sharpened by the device embodying the principles of the invention herein by the use of any one of the supporting bracket bodies disclosed in the drawings. Base I4 is normally held in tensioned tight relation to the platform] by means of a resilient element, such as a coil spring I! which may be .secured in any desirable manner to the base [4 and the lower portion of face 6 of the supporting bracket. It is, ofcourse, obvious that means other than a coil spring as shown might be employed for the purpose of holding the base andplatform in tight relationship.

The teeth of saw chains wear from use and sharpening and therefore there must b some means provided for compensating for this wear, in order to assure uniformly sharpened teeth.

This is accomplished by providing adjusting with base M which has threaded openings to receive these adjusting bolts in coinciding relationship to the much larger unthreaded openings l3 formed in platform 1. v

A file carrier frame, designated generally by reference character C, has a pair of spaced openings 20 (only one of which is revealed in the drawings), formed through the bottom portion 2| thereof in which the adjusting bolts 18 and I9 freely rotate. Threaded upon each of. the

adjusting bolts l8 and 19, between the" bottom M, having a plurality anaemia,

por-tiom ithedrameandatheetomombasezl4e. aIEwai-rSaDf ockmuts imam-2 .HIIdlLZZffdhdifl Byathis arrangement:betweemthesaidjnsting:boltss andz'stheevarious'snuts',xthe:file carrier:irameiamaywberradjusted intrelationgtoltheebase 1.4;itoith top; 5,. of the saw bar-am"andztorthe teetlr:ofirthexchainr. saw: tocwhatevenzalignmentrthati mayeb'e tadesired. Tor-give easienaccessto the headsZMand 24-.ifof1 bolts Brand [9; a; pa-1130f? openings.:25 a-nd 25! are formed through-the 1301)"P01ti011'25f0f the frameia lot A file carrier-andiguide :block; designated gen 1 erail'y 'by referencercharacter D, is movably conefined jbetween the top-portion =2 B and bottom-porethin :12 l f of :the:-frame;-' and is heldfin lateral ipive otal-fi relation zth'ereto; by pin ZTE whictf -extendse 15;. through the topv portion'of th'e frame inta ziproxi fi mate r alignment with? and equi-Idi'stant from 'openings ZOi The-zfile:oarrien-andiguide-sblockrD is \thus per-mittd 1 to move within: the frame 7 O" with pin}; 2T as the axis' I to therebyvinscrib'e a 20.: wide are. and thus all'owingthefile' to-dd'the same in=5order--to===permit its properalignment with the teeth to-"be sharpened-f Thestructuralchap acteristics "of the file carrier and guide block D is best illustrated= in Fi'gn-re-- 7; which -shhws a threaded {recess -28E formed==within the':top =29-*o f the carries in "coinciding ;re1ation- -to pairs of lock openings =30 and 30" formedin a =concentric are a at the-tOp -ZB of frame Ci one ofeach" pairs ofopenings being positioned at a 30 degree angle 30: considering the pm--21 asthe aXis,-and-the other opening of each-*pair' being positioned ahadegree-- angles Obviously? additional openings having other angular-relationship to pin 2T rnayb'GDI'OVidd-fEO allow for; setting the carrier-at" any-angle {desired foreguiding the movement' of- I the "file :in "relation" to --the -saw-teeth of a chain" saw -and indieia-may-be:addedjto the ijJCD'jJQf' tidn to'indicate the angle ofe'achyopeningw Upon the alignment of recess -28 *with 'any-one'of" these 40 openings-'3 0 i or" 3|! -a ---threadedmem ber-';such-i as a" wing -bo1t '--3 I, may-be inserted through said: opening-$0 or-3B"*'and' threaded"into recess 28"" and-thus- "lock' the file *carriewand guide blocki at thedesiredangle; 4.5 A" pair. of? externally spaced "parallel guide sleeve "boresifl land 32- are formed-longitudinally of the carrier. 'D'I An'opening -33'is also formed longitudinally; through" the -carrier,-D;TI'below. the r sleevebores 3 I and 32., so that the axisofjlallmiof .f them,' when':'joined .togethemiorm a1trian l8ll A. pair :of rods 34 'andvfiilsnugglylflndjs1idab1y,; fit 1 into sleeve-bores 3 iii anew; respectiv ly; and a; round file 35; or diamond.shapedfiljTfisfteehg; reciprocablie Lirrrelatiolnnto pnenin :3 3; Carrier; i, blochD'has a-htransverse.entoutdas,shown zatifiil; inordcrt opreventlitfromcontactineithecchainii saw,. when itis movedgaboutits-pivot pin 21;; Set. cured to the ends of guide rods '34.and;35;an.d file 36 or 3l,,arew,akpair;.of.endxvallson blocks,39iand cos 41L which notionlyglimitthereciprocation of-the, rods; and:.rfilewinirelation vto guideblock D, butz which ialsdreinforce "andlmaintain, in, alignment, he lids, and fildassembly;heretoforesdescribed Theseeendblocks.3alfand have; otcourse, openoast in'gs coinciding withithebores 3t andtlandwithe openin -3 3 ltoereceivetheiends of the rods and-file..." Hojvveveri-thediameten of the opening rincthelend i blocks coincidingewith' the. opening 33 of, .jcarrie. Djisless thanthe .diameter .ot 'said.'.opening, some that. the Mendsiot the. filer; 5 {.0113 L can cbe ssecurely t anchored-therein, Theseend 131001131151 8 remow ably secured, ,to therodsandfile .asillustrateduini Figure 2, iniany desirablemmanner, asrby retains ing, screws A l, llhhndgih'endflb 9;; and-A431; 1'82;

5nationtwithfl.thesamhbarcof-ia; chainisaw a supspectivelmzw Thussit::camreadilyzabesseenzthatazbm? releasin hesesscrewsztheaendziblocks cambe .ree moved; andiatheefileschanged;when:desirecki; In: additiomto; the aopeningsa. for;.:reeeiving;;the rods: andith'e file, therezais :also-.provided,icentrally f5. eachLblock;::a=tth1:eadedsopening flzintotwhic arshandleuii may:b'e:threadably' secured; .Sincesuclr: a threadedmpeningiis provided .in 'each end blockthe manual reciprocationaof :the :rodsrandjfilezim relationatorthe =guide -b1ock& mayibevaccomplished from either end? This completes the detailed description ofri'th'ei invention-and"thdoperation of the saw 'filingde vice may now b'e'explained; Before the device canb'eused; it isnecessarywto first determine whiohtype of supporting' brack'et should bea se cured to the sawharx The choice-is entirely controlle'db'y the=angle =and'pitch of "therteethrthat 21-13840 bra-"sharpened." The base of-"the device-is then -hinged in-- positiononth'e chosen platform; The -fra-me of {the de'vice is then-=- ad-justed in; re-t lation tethe ba'se-and to the topof th'esaw-ha'nw through ithe-iadjustin-g bolts and nuts; so that it -is-in proper alignmentwith the top oith'esawbar-and-with 'the teeth-of the-chain saw.= Lastly: the rpositionof'th'e file-carrier guide ,biockin re lation-to -the"bevel angle of the-cutting edger-of the teeth to -be--sharpened must- 'be determined; Having positioned the carrier, it is 'lockedinto the frame and thedevice is now ready tobe *usedfor filing? The "fl-ling, is -acoomp1is'hedby first placing "2. tooth to: be--filed-iagainst "the tfile and thereafter usin gsli'ghto forward'pressure orr-thetooth, pushing -the file- 'forwardfandreleasing 'the pressure on *the-.-tooth:-on-:the rearward stroke -of the file; Since the teeth 011". a chain saw are; positioned thereongso that-their cutting-faces are, oppositely" disposed in'alternate relation to each other; only such teeth are: filed from on :one side of the. saw

the :saw b'ar and"at.tache d. on "the :opposite :side

of gthesaw bar to me .the remainin teeth of the; chainsaw. (See Figure-11:) The chain is:advancedsto the .next filin position after each tooth: is fi1. d.'..'.. Since the device is positioned iin..;rela v ti'oinitoi the saW,-ba1:..so. thatithe file interferes with; the movement. :of the chain saw, it is necessary to, raise ,thefievice ;aftr;each forward "and rearward.reoiprocationof the file'jin order to per: mlt theichaintovbe movedto the next filihgPQsi-i tiojn andthis is.acc0mp1ishediby raisingmr :low-

meat-Leanna; raisin he; fileinto. the position;

shownindotted.lihesinjigurel Fromm thefi-lforeeoine,descriptiom, it. will; un.-' ddnbtedl'ygappeanthait the invention as, described. satisfies .;the.; objects. endpoints. outi-the advanr tagesclaiimed lfo'r this invent-ion While; the in:

vention has wbeenldescribedin.connectionwitha L specificembodimenLitshoulci .be understood that variants thereof are .possiblemtoithosel skilled inn hesartm Theiinvention, therefore, initsloroader. aspect; isnot. limited. to .the specific; construction v, hereimshown rend described since. vchanges "and alterations may befl-made inethe proportions and;

arrangements flofigthe "various ,parts without do: parting; from :the spirit Moths-invention.

' Having thus described. invention- ,what ,I 5

claim as new-and .upontwvhichiI desire to secure.- LetterszPatent-isza 1 In, azdevice :of :the class described ,lin-combiport bracket removably securable to the saw'bar and having the angle of its platform portion determined by the configuration and pitch of the teeth of a chain saw, a frame supporting base hingedly and removably secured to the support bracket, resilient means secured to the support bracket and supporting base tending to hold said supporting base to the platform portion of said support bracket, a file carrier frame disposed upon said supporting base, means for vertically positioning said carrier frame in relation to said supporting base for permitting the alignment of the frame in relation to the saw bar and teeth of the chain saw, a file carrier guide block secured Within said frame in'pivotal relation thereto and adapted to inscribe a wide arc within theconfines ofsaid frame, means for locking said guide block in said frame after its alignment in relation to the teeth of the chain saw, a file reciprocably positioned in said guide block, a pair of end walls removably secured to said file to limit its movement in said guide block, means slidably positioned within said guide block to control thereciprocation of said file in relation to said guide block, said means removably secured to said end walls, and a handle removably securableto either of the end Walls for assisting in the reciprocation of the file and the raising or lowering of the supporting base on its hinged connection with the supporting bracket.

2. In a device of the class described, in combination with the saw bar of a chain saw, a-support bracket removably securable to the saw bar and having the angle of its platform portion de-.

termined by the configuration and pitch of the teeth of a chain saw, a frame supporting base hingedly and removably secured to the support bracket, afile carrier frame disposed upon said supporting base, means for vertically positioning said carrier frame in relation to said supporting base for permitting the alignment of the frame in relation to the saw bar and teeth of the chain saw, a file carrier guide block secured within said frame in pivotal relation thereto and adapted to inscribe a wide are within the confines of said frame, means for locking said guide block in said frame after its alignment in relation to the teeth of the chain saw, a file reciprocably positionedin said guide block, a pair of end walls removably secured to said file to limit its movement in said guide block, means slidably positioned within said guide block to control the reciprocation of said file in relation to said guide block,,said means removably secured to said end walls, and a handle removably securable to either of the end walls for assisting in the reciprocation of the file and the raising or lowering of the supporting base upon its hinged connection with the supporting bracket.

3. In a device of the class described, in combination with the saw bar of a chain saw, a support bracket removably securable to the saw bar and having the angle of its platform portion determined by the configuration and pitch of the teeth of a chain saw, a frame supporting base hingedland removably secured to the support bracket, a file carrier frame disposed upon said said guide block, a pair of end walls removably.

secured to said file to limit its'movement'in said guide block, and means slidably positioned within said guide block to control the reciprocation of said file in relation to said guide block, said means removably secured to said end walls.

4. In a device of the class described, incombination with the saw bar of a chain saw, a support bracket removably securable to the saw bar and having the angle of its platform portion determined by the configuration and pitch of the teeth of a chain saw, a frame supporting base hingedly and removably secured tothe support bracket resilient means secured to the support bracket and supporting base tending to hold said supporting baseto the platform portion of said support bracket, a file carrier frame disposed upon said supporting base, means for vertically posi-- tioning said carrier frame in relation to said supporting base for permitting the alignment of the frame in relation to the saw bar and teeth of the chain saw, a file carrier guide block secured within said framein pivotal relation thereto and adapted to inscribe a wide arc within the confines of said frame, means for locking said guide block-in said frame after its alignment in relation to the teeth of the chain saw, a-file reciprocably positioned in said guide block, and a pair of end walls removably secured to said file to limit its movement in said guide block. 7

5.A device of the class described, to be used with standard chain saws, comprising a support bracket having the angle of its platformportion determined by the configuration and pitch of the teeth-.of a chain saw, a frame supporting base hingedly and removably secured to the support bracket, resilient means tending to hold said supporting base to the platform portion of said support bracket, a file carrier frame disposed upon said supporting base, means for vertically positioning said carrier frame in relation to said supporting base for permitting the alignment of the frame in relation to the teeth of the chain saw, a file carrier guide block secured within said frame in pivotal relation thereto and adapted to inscribe a wide are within the confines of said frame,- means for locking said guide block in said frameafter its alignment in relation to the teeth of thechain saw, a file reciprocably positioned in said guide block, a pair of end walls removably secured to saidfile to limit its movement in said guide block, means slidably positioned within said guide block tocontrolthe reciprocation of, said filein relation to said guide block said,

means removably secured to said end walls, and a handle removably securable to either of the end walls for assisting in the reciprocation of the file and the raising or lowering of the supportin b se J on its hinged connection with the supporting bracket.

6 A chain saw filing device, comprising a:

support bracket having the angle of its platform portion determined by the configuration and pitch of the teeth of a chain saw, a frame supporting base hingedly and removably secured to the support bracket, a file carrier frame,

fines of said frame, means for locking said guide block in said frame, after its alignment in relation to the teeth of'a chain saw, a file recipro- 10 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 346,541 Gibson et a1 Aug. 3, 1886 537,827 Kaempfer Apr. 23, 1895 1,754,378 Waller Apr. 15, 1930 1,852,276 Waller Apr. 5, 1932 1,900,084 Waller Mar. 7, 1933 2,323,527 Ewers July 6, '1943 2,484,417 Mease Oct. 11. 194 

